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A kind of preparation method of molybdenum-tungsten-lanthanum alloy wire

A technology of alloy wire and molybdenum alloy, which is applied in metal wire drawing, metal processing equipment, manufacturing tools, etc., can solve problems such as not being able to better adapt to the alignment of molybdenum wire, affecting the final molding quality of the product, and not being able to adjust the diameter of the through hole. Achieve the effect of improving straightening effect, simple structure and low production cost

Active Publication Date: 2019-06-25
金堆城钼业光明(山东)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter of the through hole opened by the main shaft in traditional equipment is constant. After a period of use, wear will occur and the gap will increase. The rotation of the molybdenum wire will collide with the inner wall of the straight through hole, which will affect the final molding quality of the product.
In addition, since the diameter of the through hole is not adjustable, it cannot better adapt to the alignment of molybdenum wires of different specifications, and the use is not flexible enough and cheap

Method used

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  • A kind of preparation method of molybdenum-tungsten-lanthanum alloy wire
  • A kind of preparation method of molybdenum-tungsten-lanthanum alloy wire
  • A kind of preparation method of molybdenum-tungsten-lanthanum alloy wire

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preparation example Construction

[0037] In the method for preparing a molybdenum-tungsten-lanthanum alloy wire according to the present invention, the raw materials required for preparing the molybdenum alloy wire include the following components in terms of mass fraction:

[0038] Lanthanum oxide 0.1-0.7%;

[0039] Tungsten 0.5-3.0%;

[0040] The rest is high-purity molybdenum trioxide and unavoidable impurities.

[0041] The preparation method of molybdenum-tungsten-lanthanum alloy wire comprises the following steps:

[0042](1) Prepare high-purity molybdenum trioxide, lanthanum oxide and tungsten according to the mass fraction;

[0043] (2) High-purity molybdenum trioxide is put into a low-temperature reduction furnace, and a reduction is performed under a hydrogen atmosphere to obtain molybdenum dioxide powder;

[0044] (3) Mix molybdenum dioxide powder, lanthanum oxide, and tungsten according to the ratio, and mix them evenly in a powder mixer;

[0045] (4) Put the doped mixture into a high-temperatu...

example 1

[0050] Example 1. Press La 2 o 3 0.1% by weight, 0.5% by weight of tungsten doped, 100gLa 2 o 3 and 500g of tungsten powder are added to 100kg of molybdenum dioxide powder, mixed well, and then reduced with hydrogen in a high-temperature reduction furnace to obtain molybdenum-tungsten-lanthanum alloy powder. Put the molybdenum alloy powder into the rubber sleeve, press it into a round molybdenum rod with an isostatic press under a pressure of 160-180Mpa, and then sinter at a high temperature of 2000°C in an intermediate frequency sintering furnace to obtain a molybdenum-tungsten-lanthanum alloy molybdenum rod. After multi-pass swaging and drawing, it is processed into a molybdenum-tungsten-lanthanum alloy wire with a diameter of 0.18mm. The tensile strength measured by the electronic tensile testing machine (100N) is 2400N / mm 2 .

example 2

[0051] Example 2. Press La 2 o 3 Doped with 0.4% by weight and 1.5% by weight of tungsten, 400gLa 2 o 3 Add 1500g tungsten powder to 100kg molybdenum dioxide powder, mix well, and then reduce with hydrogen in a high-temperature reduction furnace to obtain molybdenum-tungsten-lanthanum alloy powder. Put the molybdenum alloy powder into the rubber sleeve, press it into a round molybdenum rod with an isostatic press under a pressure of 160-180Mpa, and then sinter at a high temperature of 2000°C in an intermediate frequency sintering furnace to obtain a molybdenum-tungsten-lanthanum alloy molybdenum rod. After multi-pass swaging and drawing, it is processed into a molybdenum-tungsten-lanthanum alloy wire with a diameter of 0.18mm. The tensile strength measured by the electronic tensile testing machine (100N) is 2550N / mm 2 .

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Abstract

The invention provides a preparation method of a molybdenum-tungsten-lanthanum alloy wire and belongs to the technical field of preparation of materials. The preparation method is characterized in that raw materials for preparing a molybdenum alloy wire comprise the following ingredients according to mass fraction: 0.1 to 0.7 percent of lanthanum oxide, 0.5 to 3.0 percent of tungsten and the balance of high-purity molybdenum trioxide and inevitable impurities. By simultaneously doping the lanthanum oxide and the tungsten and also simultaneously doping the two elements lanthanum and tungsten incombination with dispersion strengthening and solution strengthening mechanisms, the preparation method provided by the invention can comprehensively improve the strength and the high temperature resistance of the molybdenum alloy wire. Compared with a molybdenum-lanthanum wire, a molybdenum-lanthanum-neodymium alloy wire prepared by the preparation method is higher in strength; for instance, when the diameter of the neodymium alloy wire is 0.18 mm, the tensile strength can be increased by 10% to 20%; and heavy current wire cut electrical discharge machining is adopted, so the service life can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method of molybdenum alloy wire doped with lanthanum oxide and tungsten. Background technique [0002] The addition of rare earth lanthanum to pure molybdenum can play a role in dispersion strengthening, which can not only improve the strength and toughness of molybdenum materials, but also increase the recrystallization temperature of molybdenum and improve its high temperature resistance. Therefore, lanthanum-doped molybdenum alloys are used instead of pure molybdenum. Electric heating materials, wire cutting electrode materials, electric light sources and other industries. However, the lanthanum-doped molybdenum alloy has a single doping element, and the strength and recrystallization temperature of the molybdenum material are limited, so it is difficult to meet higher requirements, such as high-current wire EDM, high-temperature resistan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/04B21C19/00B22F3/04B22F3/10B22F9/22B23H1/06C22C1/04C22C27/04
CPCB21C19/00B21C37/04B22F3/04B22F3/10B22F9/22B22F2998/10B23H1/06C22C1/04C22C27/04
Inventor 李世伟孟庆乐黄立峰张鹏王卫张志国刘宝庆
Owner 金堆城钼业光明(山东)股份有限公司